Silicon Carbide Ceramic (SiC) Parts

High-performance ceramic for extreme wear resistance,

high-temperature stability, and demanding industrial

environments.

What is Silicon Carbide Ceramic?

Silicon carbide ceramic (SiC) is a high-performance advanced ceramic known for its extreme hardness, excellent wear resistance, and outstanding thermal stability.

Compared with many traditional engineering materials, silicon carbide offers exceptional resistance to high temperatures, corrosion, and mechanical wear, making it one of the most reliable ceramics for harsh operating environments.

Silicon carbide ceramics are widely used in mechanical seals, high-temperature furnace components, semiconductor manufacturing equipment, and wear-resistant industrial systems, where durability and reliability are essential.

Key Features of Silicon Carbide Ceramics

Extreme Hardness and Wear Resistance
Silicon carbide is one of the hardest engineering ceramics, making it ideal for highly abrasive and wear-resistant applications.
Excellent High-Temperature Stability
SiC ceramics maintain excellent mechanical strength and structural stability at elevated temperatures.
Outstanding Corrosion Resistance
The material exhibits strong resistance to acids, alkalis, and aggressive chemical environments.
High Thermal Conductivity
Silicon carbide efficiently dissipates heat, making it suitable for high-temperature industrial systems.
Low Thermal Expansion
Its low coefficient of thermal expansion helps maintain dimensional stability under thermal stress.
Long Service Life in Harsh Environments
Due to its durability and wear resistance, silicon carbide components typically offer extended service life.

Technical Properties of Silicon Carbide Ceramic

The following table summarizes the typical physical, mechanical, thermal, and electrical properties of silicon carbide ceramic (SiC). These values are provided for reference and may vary depending on material grade, manufacturing process, and application conditions.

Property	Unit	Typical Value	Notes
Material Name	—	Silicon Carbide Ceramic	SiC Ceramic
Material Type	—	Non-oxide ceramic	Advanced technical ceramic
Chemical Formula	—	SiC	Silicon carbide
Color	—	Black / Dark gray	Typical appearance
Crystal Structure	—	Hexagonal	α-SiC structure
Porosity	%	<1	Dense sintered ceramic
Machinability	—	Limited	Requires diamond grinding

Property	Unit	Typical Value	Notes
Density	g/cm³	3.1 – 3.2	Typical value
Water Absorption	%	0	Dense material
Specific Heat	J/kg·K	~750	At 25 °C
Thermal Diffusivity	m²/s	~8 ×10⁻⁵	High thermal diffusivity

Property	Unit	Typical Value	Notes
Young’s Modulus	GPa	~410	Very high stiffness
Shear Modulus	GPa	~170	Typical value
Poisson’s Ratio	—	0.14	Typical value
Vickers Hardness	HV	2500 – 2800	Extremely hard
Flexural Strength	MPa	350 – 450	Depends on grade
Compressive Strength	MPa	3500 – 4000	Very high strength
Fracture Toughness	MPa·m½	3 – 4	Typical value

Property	Unit	Typical Value	Notes
Maximum Continuous Operating Temperature	°C	1400	In air
Maximum Short-Term Temperature	°C	1600	Short exposure
Thermal Conductivity	W/m·K	120 – 180	Very high conductivity
CTE (25–1000 °C)	×10⁻⁶ /°C	4.0 – 4.5	Low thermal expansion
Sublimation Temperature	°C	~2700	No true melting point

Property	Unit	Typical Value	Notes
Dielectric Constant (1 MHz)	—	9 – 10	Typical value
Loss Tangent	—	~0.001	Typical value
Dielectric Strength	kV/mm	15 – 25	Typical value
Volume Resistivity	ohm·cm	10³ – 10⁵	Semiconductor behavior
Electrical Conductivity	—	Moderate	Depends on grade

*All values shown are typical material properties and are provided for reference only. Actual values may vary depending on material grade, manufacturing process, and testing conditions.